A Multihull, in the context of yachting, refers to a type of watercraft that features more than one hull. Unlike monohull yachts which have a single hull, a multihull yacht is designed with two or more, often parallel hulls of the same size. The most common types of multihull yachts include catamarans (two hulls) and trimarans (three hulls). The extra hulls contribute to the yacht's stability, effectively reducing the degree of heeling (leaning over due to wind or waves). This design feature broadens the internal space, leading to more comfort and living space onboard. Also, due to a decrease in hydrodynamic resistance, multihull yachts typically move faster than their single-hulled counterparts. These characteristics make multihull yachts a popular choice for long-distance cruising, racing, and chartering.

1. Catamaran: This type of yacht features two parallel hulls of equal size. It provides a large deck space and stability, making it ideal for both recreational and racing purposes. 2. Trimaran: A trimaran yacht has three hulls - one main central hull and two smaller hulls or amas connected to the main hull with lateral beams. These yachts are renowned for their amazing speed and stability in water. 3. Outrigger Canoe: While not traditionally a yacht, this could be considered a multihull vessel. This vessel has one large hull and one or more smaller supporting hulls. 4. Proa: This multihull yacht design originates from the Pacific Islands. It has two unequal size hulls, allowing it to sail efficiently in multiple directions depending on the wind. 5. Wave-piercing Catamarans: This type of yacht features hulls that are designed to cut through waves rather than riding on top of them, resulting in a smoother ride in rough waters. These are specific high-performance catamarans, and depending on the size, they can also be considered as multihull yachts.

Multihull yachts, which include catamarans and trimarans, have a distinct advantage over traditional monohull yachts. They are designed with two or three hulls that are parallel to each other, offering increased stability and speed. A key fun fact about these multihull yachts is that due to their stability, they rarely heel (lean) more than 10-15 degrees, compared to a monohull yacht that can heel up to 45 degrees. This makes life on board safer and more comfortable, reducing the risk of seasickness and making it easier to move around the boat. This feature alone makes multihull yachts a popular choice for families and large groups. Their fast speed has also made them a favourite in racing circles, with the fastest sailing record being held by a trimaran.